Stop for counter-shafts.



J. MQORUDDEN. STOP FOR COUNTER SHAFTS. APPLIOATIONIFILED MAR. 10, 1913 Patented June 16, 1914.

JOSEPH E. MOCRUDDEN, OF PROVIDENCE, RHODE ISLAND.

STOP FOR COUNTER-SHAFTS.

Specification of Letters Patent.

Patented June 16, 1914.

Application filed March 10, 1913. Serial No. 753,147.

To all whom it may concern:

Be it known that I, JOSEPH E. MOCRUD- DEN, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Stops for Counter-Shafts, of which the following is a specification.

My invention relates as a new article of manufacture to a device or apparatus intended for the prevention of the accidental creeping of the belt from one pulley to another, and more particularly from a loose pulley to the fast pulley of a shafting where creeping of the belt results in the unexpected actuation of the machine parts.

A further object is to effect the desired end by a structure that is simple, inexpensive and capable of application to any form of shafting and which may be applied without any substantial reorganization of the shafting parts.

To the above ends essentially my invention consists in such parts and such combi nations of parts as fall within the scope of the appended claim.

In the accompanying drawings which form a part of this specification, Figure l is a front view of a shafting embodying my invention, Fig. 2, a section on line a" w of Fig. 1, Fig. 3, a side elevation of one of the clamping plates, Fig. 4, a section on line y y of Fig. 1, Figs. 5 and 6, top and side elevations respectively of the spring member, and Fig. 7, a modified view of a hub.

Like reference characters indicate like parts throughout the views.

My invention is shown herein in connection with an ordinary shafting comprising the usual hangers A, and hanger arms a carrying upon their ends the bearings a.

B is the horizontal shaft mounted in the hangers in the usual manner, and C the shifter bar mounted in the bearings a and operated by the shifting lever D pivotally connected with the shifter bar at d, and operated in the usual manner.

E and E are respectively the loose and fast pulleys, and e and e" the usual belt forks therefor.

It is in conjunction with any well known shafting of which the above is a sample that my invention is herein shown. Integral with the shifter bar C or attached thereto in any convenient manner is a hub F. This hub is located at either side of the hanger that may be preferred. In the present instance it is illustrated outside one of the hangers. In detail it comprises a doubly inclined outer surface f, the inclination being upwardly from the ends, forming a nearly elliptical body. Intermediate its length the hub is provided with a cavity 9 which may be of any desired shape, but preferably as shown V-shaped. The cavity may if desired be annular, as at g, in Fig. 7 without departing from the spirit of my invention. The hub F might be integral with the shifter rod C, but when non-integral with the bar the hub has a central axial opening G, as shown in Fig. 4, to receive the bar C and is provided with a threaded opening g leading to the opening G to receive the shank h of a binding screw I-I adapted to bind the hub to the bar. One of these hubs only is necessary for the purpose of my invention, but sometimes it is convenient to multiply the number of hubs, and as shown in Fig. 1 a second hub F may be fixed to the shaft adjacent the first, but more remote from the hanger. It will be understood that the hub F is in all details similar to the hub described.

A spring member is adapted to register in the cavity 9 of the hub and retain the shifter bar in shifted position. This spring J is provided with a depending substantially V- shaped head j upon its outer end, it being understood that the shape of this head or shoulder is governed largely by the cross sectional shape of the cavity 9 and may be U-shaped in cross section without departing from the spirit of the invention. This spring is provided near the end opposite the head with a perforation 7' to receive an at taching screw 9' It is highly advantageous however to apply my device to a shafting already in position wherein it would be expensive or inconvenient or impossible to mount the parts without dismounting the entire shafting already in position. In such cases an auxiliary portion of my invention consists in a device adapted to be applied to the shifter bar, which device afl'ords a suitable member to which to fix the spring J. In detail the auxiliary portion of the structure consists of two plates K and L, oblong in shape, and provided respectively with central openings k and Z adapted to loosely receive the bar 0, and provided respectively with end openings k and Z adapted to receive binding bolts M upon Whose ends are heads m bearing upon the outer face of the plate L, by means of which bolts and nuts the plates K and L are clamped rigidly against the ends of the cylindrical bearing 0.. The plate K is provided with a hub or boss 0 provided preferably with a flattened portion 0 upon its side, which in the present instance is shown recessed to afford a support for the end of the spring J which is attached to the hub 0 by the screw j The operation of my device is as follows. When the shifting lever D is in the position shown in full lines in Fig. l the belt .is on the loose pulley E, and the spring member J has its head in engagement in the cavity of the hub F. \Vhen however thelever is thrown to the position shown in dotted lines whereby the belt is thrown upon the fast pulley E the head of the spring member is thrown out of the cavity 'of the hub F by reason of the longitudinal pulley and when the belt is on the loose pulley. hen only one hub is used the spring will enga e the hub only when the belt is on one puIley. In the latter case it is preferable that the pulley whereon the belt should be locked should be the loose pulley.

It will be observed that by the above described construction no accidental creeping or other dislocation of the belt from the loose pulley to the fast pulley can take place.

What I claim is In a shafting, the combination with a bearing member and a shifter bar longitudinally movable therein, of a hub movable with said bar, a pair of plates bearing against the ends of said bearing member, one of said plates having a hub with flattened portion, means for securing the plates against the ends of the bearing member, and a resilient member secured at one end to the said flattened portion and its free end engaging the hub on the shifter bar.

In testimony whereof I have aflixed my signature in presence of two witnesses.

JOSEPH E. MCCRUDDEN.

WVitnesses:

I'IORATIO E. BELLOWS, F RED W. PERKINS.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

